Skip to content
OpenAdvisories
Critical RHSA-2026:34211 1 CVE

Red Hat Security Advisory: glibc security update

Published Jul 2, 2026 · Updated Oct 15, 2026

Ecosystem: Red Hat

Fixed packages 9

ReleasePackageFixed in
Red Hat · RHEL 7 ELS rhel_els:7 glibc 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-common 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-debuginfo 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-debuginfo-common 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-devel 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-headers 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-static 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 glibc-utils 0:2.17-326.el7_9.6
Red Hat · RHEL 7 ELS rhel_els:7 nscd 0:2.17-326.el7_9.6

Vulnerabilities 1

  • Critical 9.8
    CVE-2026-5450

    scanf %mc off-by-one heap buffer overflow

    Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.

    The GNU C Library glibc glibc eglibc Debian Ubuntu Azure Linux Wolfi

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2459853
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_34211.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-5450
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-5450
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-5450
  • article
    https://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#u
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-5450#range-21286997
  • article
    https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450